I will be visiting London in September. We are a group of 4 adults ( 2 seniors-over 65, two SIGNIFICANTLY under 65 ;-)). We arrive at Heathrow and will be spending 2 nights in London (St James area), will then travel by train to Bath for 2 nights returning to London (same hotel) for the final 3 nights before returning home via Heathrow. I have looked at the transportation options and believe the Tube/rail is the most efficient and economical mode of travel. That being said, the tickets options are a bit confusing for me (zone restrictions, peak vs off-peak, etc). Could anyone simplify this for me. I know there is a 2-4-1 offer for many of the tourist sites if you have the rail ticket and I would like to take advantage of that but I am confused as to wether the rail ticket referred to in the text is the same as the travel card. If I have the 7 day travel card do I need to purchase an additional ticket for the fare to Bath or is that included? Any other helpful hints you have would be appreciated. I think I figured out that the Oyster card is not necessary but would love some local or seasoned London traveller knowledge.